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Circuit Protection for LED

& Circuit Protection. Circuit Protection for LED. AVX Lights The Way. The Power Of Light Lighting the way Forward. Old Technology. Next Generation Technology. Current Technology. LED Applications. Architectural lighting Discrete LED lighting Display case lighting Electronic signs

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Circuit Protection for LED

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  1. & Circuit Protection Circuit Protection for LED AVX Lights The Way

  2. The Power Of LightLighting the way Forward Old Technology Next Generation Technology Current Technology

  3. LED Applications • Architectural lighting • Discrete LED lighting • Display case lighting • Electronic signs • Mass transit lighting and signaling • Theatrical lighting • Traffic signals • Under cabinet lighting • Automotive lighting • Indoor/Outdoor lighting • Laptops/portable displays

  4. What is Driving the Lighting Market to LED and SSL? • Why are LED’s being used in new lighting applications? • Rising cost of energy • Falling cost of technology • LED cost per lumen decreased by 30% over the past year • Government regulations • RoHs (reduction in mercury content impact CFL devices) • Emissions reduction targets • Building performance requirements • Increase in use of lighting controls • Energy efficiency requirements

  5. LED & Circuit Protection • LED light output is directly proportional to the forward current • More Power = brighter lights • More Power = more need for capacitors and LOW LEAKAGE circuit protection equipment • A drive/control circuit must be used to control the LED’s current • More ICs = increased component count • LED’s reverse breakdown voltage usually low (5V to 10V) • The designer must be careful to insure protection of the device • LED’s are ESD sensitive • More opportunities for varistor based product

  6. LED Driver Topologies - Linear T-Guard VC06LC18X500 * NbO or High CV MLCC (Depending on stack voltage) Note: TransGuard operating voltage should be =/> than the LED stack applied voltage

  7. LED Driver Topologies - BUCK NbO or High CV MLCC (Depending on output voltage) T-Guard VC04LC18X500 * NbO or High CV MLCC (Depending on input voltage) Buck, or step-down, voltage converters produce an average output voltage lower than the input source voltage. Note: TransGuard operating voltage should be =/> than the LED stack applied voltage

  8. LED Driver Topologies - BOOST T-Guard VC04LC18X500 * NbO or High CV MLCC (Depending on output voltage) NbO or High CV MLC High Voltahe RMS MOV/MLV Boost, or step-up, converters produce an average output voltage higher than the input source voltage. Two AVX Caps! Note: TransGuard operating voltage should be =/> than the LED stack applied voltage

  9. LED Driver Topologies BUCK / BOOST T-Guard VC04LV18X500 Or VC06AG183R0YAT * C2 NbO or High CV MLCC (Depending on input voltage) NbO or High CV MLCC (Depending on input voltage) • A combination of buck and boost. • Output is inverted, and its magnitude can be less or • greater than the input. Note: TransGuard operating voltage should be =/> than the LED stack applied voltage

  10. High Current/Multiple LEDs TransGuard VC06LC18X500 * 1KV, 222pf HV Ceramic 2220 w flexiterm Oxicap or HiCV HiCV or Oxicap • AVX Solution • 9 AVX Capacitors • 1 Varistor • 1 fuse • multiple connectors! Oxicap or HiCV Note: TransGuard operating voltage should be =/> than the LED stack applied voltage

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